Convicted of murdering his wife, a crime of which he declares himself innocent, Jacques Mazur is serving a long sentence in a prison where his presence causes disruption.
| Actor | Role |
|---|---|
 Gérard BlainMazur | Mazur |
 Juliette MaynielMichèle | Michèle |
 André OumanskyCharly | Charly |
 Jean-Pierre JaubertThéo | Théo |
 René DaryDirector | Director |
 Robert PartyDeputy director | Deputy director |
 Étienne BierryGagnaire | Gagnaire |
 Julien VerdierButtiaux | Buttiaux |
 Pierre RichardPierini | Pierini |
 Henri LambertLasserre | Lasserre |
| JJean BesnardBally | Bally |
 Georges LycanMathon | Mathon |
 Yves BarsacqStage director | Stage director |
 Georges AdetLe Goff | Le Goff |
| JJean BarrezLaurin | Laurin |
 Charles BouillaudNot listed | Not listed |
| CClaude CastaingNot listed | Not listed |
 Henri CoutetNot listed | Not listed |
 Hubert DeschampsNot listed | Not listed |
| MMarie DonneaudNot listed | Not listed |
| MMichel DuplaixNot listed | Not listed |
| SSam EndelNot listed | Not listed |
| MMichel FerrandNot listed | Not listed |
 Émile GenevoisNot listed | Not listed |
| GGilles LégerNot listed | Not listed |
 Rodolphe MarcillyNot listed | Not listed |
| PPierre PelouxNot listed | Not listed |
 Yvon SarrayNot listed | Not listed |
| RRoger TrécanNot listed | Not listed |